Please solve this and give full explanation and how we put in this cos please tell me
ARUN KUMAR , 6 Years ago
Grade 12th pass
10 grade maths> Please solve this and give full explanati...
1 Answers
Aastha Singh
Last Activity: 6 Years ago
Dear student,
from formula:
sin2A = 2 sinA cosA ->equation 1
from question:
2 sinA cosA= sinA
2cosA =sinA/sinA
cos A = ½ ->eqn 2
since,
cos 60 =1/2 ->from theory
cos A = ½ →from eqn 2
A = 60 deg
hope this helps :)
Provide a better Answer & Earn Cool Goodies
Enter text here...
LIVE ONLINE CLASSES
Prepraring for the competition made easy just by live online class.
Full Live Access
Study Material
Live Doubts Solving
Daily Class Assignments
Ask a Doubt
Get your questions answered by the expert for free
Enter text here...
Other Related Questions on 10 grade maths
What are the advantages and disadvantages of mean, median and mode?
10 grade maths
1 Answer Available
Last Activity: 1 Year ago
Find the sum of the first 100 natural numbers.
10 grade maths
1 Answer Available
Last Activity: 2 Years ago
AOBC is a rectangle whose three vertices are A(0,-3), O(0,0) and B (4,0). The length of its diagonal is__
10 grade maths
1 Answer Available
Last Activity: 2 Years ago
For an AP, it is given that first term (a)= 5 and Common Difference (d) = 3 and nth term = 50. Find n and sum of first n terms of AP
10 grade maths
1 Answer Available
Last Activity: 2 Years ago
The value(s) of k for which the quadratic equation 2x^2 + kx + 2 = 0 has equal roots, is (a) 4 (b) pm 4 (c) -4 (d) 0
10 grade maths
1 Answer Available
Last Activity: 2 Years ago